Time domain modal beamforming for a near vertical acoustic array
Ocean acoustic tomography permits the mapping of various properties of a body of water through indirect means. The technique utilizes travel time variations for an acoustic signal to determine the structure of the ocean medium via inverse mathematical methods. The scale of any tomography experiment...
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Monterey, California. Naval Postgraduate School
1991
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ftnavalpschool:oai:calhoun.nps.edu:10945/24239 2024-06-09T07:46:34+00:00 Time domain modal beamforming for a near vertical acoustic array Crocker, Steven Edward Miller, James H. Naval Postgraduate School (U.S.) Engineering Acoustics Academic Committee Chin, Ching-Sang 1991-12 89 p. application/pdf https://hdl.handle.net/10945/24239 en_US eng Monterey, California. Naval Postgraduate School https://hdl.handle.net/10945/24239 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. Acoustic tomography Beamforming Modal beamforming Thesis 1991 ftnavalpschool 2024-05-15T00:52:29Z Ocean acoustic tomography permits the mapping of various properties of a body of water through indirect means. The technique utilizes travel time variations for an acoustic signal to determine the structure of the ocean medium via inverse mathematical methods. The scale of any tomography experiment is fundamentally limited by the signal to noise ratio at the receiver/ Through the use of a near vertical acoustics array, normal mode modeling of the local environment and a modal beamformer, array gains are possible which greatly extend the maximum separation between source and receiver. Additionally, the technique provides temporal resolution of the model components of the arriving signal. A time domain modal beamformer for a near vertical acoustic array has been developed. It has realized a nominal array gain of 6 dB for the Heard Island Experiment vertical array deployed off California. The primary obstacle to the technique remains inadequate array geometry description. Approved for public release; distribution is unlimited. Lieutenant, United States Navy http://archive.org/details/timedomainmodalb1094524239 Thesis Heard Island Naval Postgraduate School: Calhoun Heard Island |
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Naval Postgraduate School: Calhoun |
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ftnavalpschool |
language |
English |
topic |
Acoustic tomography Beamforming Modal beamforming |
spellingShingle |
Acoustic tomography Beamforming Modal beamforming Crocker, Steven Edward Time domain modal beamforming for a near vertical acoustic array |
topic_facet |
Acoustic tomography Beamforming Modal beamforming |
description |
Ocean acoustic tomography permits the mapping of various properties of a body of water through indirect means. The technique utilizes travel time variations for an acoustic signal to determine the structure of the ocean medium via inverse mathematical methods. The scale of any tomography experiment is fundamentally limited by the signal to noise ratio at the receiver/ Through the use of a near vertical acoustics array, normal mode modeling of the local environment and a modal beamformer, array gains are possible which greatly extend the maximum separation between source and receiver. Additionally, the technique provides temporal resolution of the model components of the arriving signal. A time domain modal beamformer for a near vertical acoustic array has been developed. It has realized a nominal array gain of 6 dB for the Heard Island Experiment vertical array deployed off California. The primary obstacle to the technique remains inadequate array geometry description. Approved for public release; distribution is unlimited. Lieutenant, United States Navy http://archive.org/details/timedomainmodalb1094524239 |
author2 |
Miller, James H. Naval Postgraduate School (U.S.) Engineering Acoustics Academic Committee Chin, Ching-Sang |
format |
Thesis |
author |
Crocker, Steven Edward |
author_facet |
Crocker, Steven Edward |
author_sort |
Crocker, Steven Edward |
title |
Time domain modal beamforming for a near vertical acoustic array |
title_short |
Time domain modal beamforming for a near vertical acoustic array |
title_full |
Time domain modal beamforming for a near vertical acoustic array |
title_fullStr |
Time domain modal beamforming for a near vertical acoustic array |
title_full_unstemmed |
Time domain modal beamforming for a near vertical acoustic array |
title_sort |
time domain modal beamforming for a near vertical acoustic array |
publisher |
Monterey, California. Naval Postgraduate School |
publishDate |
1991 |
url |
https://hdl.handle.net/10945/24239 |
geographic |
Heard Island |
geographic_facet |
Heard Island |
genre |
Heard Island |
genre_facet |
Heard Island |
op_relation |
https://hdl.handle.net/10945/24239 |
op_rights |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. |
_version_ |
1801376495641296896 |